JPH06528A - Device for removing liquid stuck on surface of belt-like material - Google Patents

Abstract

PURPOSE:To remove liquid which sticks on the surface of a belt-like material such as steel strip to a very thin film. CONSTITUTION:An endless felted belt 18 is coiled round a pressing roll 20 and a drying roll 22, the felted belt 18 is pressed by the pressing roll 20 on the surface of a steel strip 16 to adsorb water on this surface, simultaneously with it a negative pressure is acted in the pressing roll 20, water is sucked quickly from a suction hole 21 on the surface of the pressing roll and most of the water sticking on the surface of the steel strip 16 is removed at a high speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for removing adhered liquid on the surface of a strip such as a steel strip.

[0002]

2. Description of the Related Art In the case of a strip, for example, a steel strip, if the steel strip surface is treated with a chemical solution or washed with water after plating, water or other liquid adheres to the steel strip surface.
It needs to be removed.

As a means for removing such adhered water and the like, for example, as shown in FIG. 6, a steel strip 2 washed by a water washing device 1 is drained and water-squeezed by a squeezing roll 3, and then a dryer is used. There is a method in which hot air is blown and dried by No. 4.

Here, the dryer is, for example, Japanese Patent Publication Sho 53.
As disclosed in Japanese Patent Laid-Open No. 1938-1990, hot air is blown from a slit pipe toward a running steel strip to dry it, and as disclosed in Japanese Patent Laid-Open No. 58-19489, a steel strip is dried in a chamber. It is known to dry by passing through.

Further, in general, the water film attached to the steel strip even after water drawing with a squeezing roll is thicker than other portions at both ends (edge portions) in the width direction of the steel strip. In order to improve the dryness of the portion, as disclosed in, for example, Japanese Patent Publication No. 1-59357, the edge of the steel strip after passing through the squeezing roll is blown with air from an air nozzle to wipe off the water film. It has been known.

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the techniques disclosed in Japanese Patent Laid-Open No. 38 and No. 58-19489, even if the squeezing roll is strengthened, there is a limit in thinning the water film thickness, and this is dried only by blowing hot air with a dryer. Therefore, there is a problem that the drying speed cannot be increased.

Further, as described above, the water film is thick at the edge portion of the steel strip, and there is a problem that the edge portion is insufficiently dried by the uniform blowing of hot air in the width direction of the steel strip. .

Further, since the water film thickness on the surface of the steel strip after the squeezing roll cannot be kept below a certain value, there is a problem that a great amount of energy is consumed if hot air is used for this drying. .

Furthermore, when the processing speed of the steel strip is increased, the water drawing performance of the drawing rolls is deteriorated, and the drying processing performance is deteriorated. Further, when an attempt is made to dry with hot air after water drawing, the hot air temperature, blown air volume, etc. There is a problem that not only the energy cost of the above increases but also the drying cannot be completely completed.

Further, in Japanese Patent Publication No. 1-59357, since the thick water film on the edge of the steel strip is wiped, even if the air nozzle blowing speed is increased, the water film removing ability is limited. Therefore, there is a problem that the water film cannot be wiped off when the steel strip processing speed is increased.

The present invention has been made in view of the above-mentioned conventional problems, and is capable of removing a liquid adhering to the surface of a strip such as a steel strip to a very thin film thickness. An object of the present invention is to provide a device for removing adhered liquid on the surface.

[0012]

According to the present invention, a felt-like endless belt is wound, and the endless belt is wound around the belt, and the endless belt is pressure-bonded to the surface of a running belt. And a second roll which is arranged in parallel with the pressure roll and which is wound around the endless belt. The pressure roll has suction holes formed in its peripheral wall. At the same time, a negative pressure is applied to the inside to achieve the above object.

The second roll may be a drying roll having a heating means for heating the wound endless belt.

The endless belts may be provided in a pair of left and right with a narrow width corresponding to both ends of the strip in the width direction.

[0015]

According to the present invention, the felt-like endless belt is pressure-bonded by the pressure-bonding rolls in synchronism with the surface of the running belt, and the liquid adhering to the surface is adsorbed to the felt by the capillary phenomenon. At the same time, it is sucked into the inside of the pressure roll by negative pressure from the suction holes formed on the surface of the pressure roll, so the state of the adhered liquid on the surface of the belt-shaped body is much thinner than the conventional one on the outlet side of the endless belt. In the subsequent step, drying by a dryer becomes unnecessary, or even if necessary, the load on the dryer becomes extremely light,
Sufficient drying can be performed.

According to the second aspect, since the second roll around which the endless belt is wound is provided with the heating means for heating the endless belt, the liquid adsorbed on the endless belt is evaporated here, The liquid adhering to the surface of the strip can be better absorbed at the position of the pressure roll.

According to the third aspect, since the endless belt is provided with a narrow width corresponding to both ends of the strip in the width direction, the water film thickly attached to both ends of the strip in the width direction can be efficiently used. Can be removed.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1 and FIG. 2, the attached liquid removing device 10 according to this embodiment is washed with a water washing device 12 and is applied to a surface of a steel strip 16 after water drawing is performed by a squeezing roll 14 in a conventional manner. It removes the attached water.

The attached liquid removing device 10 is moved to the upper and lower surfaces of the moving steel strip 16 in synchronism with it.
The endless felt belt 18 is pressed from above and below to adsorb and remove water.

Since the felt belts 18 arranged above and below the steel strip 16 and their driving mechanisms are the same in the vertical direction, only the upper felt belt 18 will be described.

The felt belt 18 is wound around a small-diameter pressure roll 20 on the side of the steel strip 16 and a large-diameter drying roll 22 arranged above the pressure roll 20. The tension of the felt belt 18 wound around is
It is adjusted by a belt tension roll 24 arranged at a position between the pressure roll 20 and the drying roll 22.

The pressure roll 20 and the drying roll 22
Are driven by drive motors 20A and 22A via couplings 20B and 22B, respectively, in the same direction and at the position of the pressure roll 20, so that the felt belt 18 is synchronized with the steel strip 16.

The pressure-bonding roll 20 has a hollow inner side, a suction wall 21 is formed in the peripheral wall, which is a large number of pores communicating the inside and the outside, and the negative pressure pump 2 is provided in the inner space.
Negative pressure is applied from 8. The suction hole 21 has a diameter of 1 mm or less.

The drying roll 22 is supplied with heating steam or hot water from a heating source 30 to heat the drying roll 22 to a constant temperature, for example, 95 ° C. or,
A dryer 32 for drying the upper and lower surfaces of the steel strip 16 is arranged on the outlet side of the attached liquid removing device 10.

Next, the attached liquid removing device 10 according to the above embodiment
The action of will be described.

The steel strip 16 that has been washed with water by the water washing device 12 and water-squeezed by the squeezing roll 14 has the felt belt 1 between the pair of pressure-bonding rolls 20 and the upper and lower surfaces thereof.
Pass through while being crimped.

At this time, the moisture adhering to the surface of the steel strip 16 is adsorbed to the felt belt 18 by the capillary action and, at the same time, the negative pressure applied from the negative pressure pump 28 to the inside of the pressure roll 20 causes the suction hole 21 to exit. It is positively sucked through the felt belt 18, and is further sucked inside the pressure-bonding roll 20 together with the water absorbed by the felt belt 18 by the capillary action. At this time, the rotation speed of the felt belt 18 is the same as the speed of the surface of the steel strip 16.

Most of the water adsorbed on the felt belt 18 from the surface of the steel strip 16 is sucked inside the pressure roll 20, but the water remaining on the felt belt 18 contacts the outer peripheral surface of the drying roll 22. , The drying roll 22
It is heated from and evaporates. Therefore, the felt belt 18
When it is rotated again to the position of the pressure roll 20, the steel strip 16
The water on the surface can be better absorbed.

Since the effect of removing the adhering liquid by the adhering liquid removing device 10 is high, only a very thin film of water remains on the surface of the steel strip 16 that has passed through the device. Therefore, if the distance to the next step is sufficiently long, the moisture is almost completely removed by natural drying.

For the purpose of more complete removal of water on the surface of the steel strip 16 or when the distance to the next step is short and the water cannot be completely removed by natural drying, the surface of the steel strip 16 is heated with a dryer 32. To dry.

The results of water removal by the apparatus of the above embodiment are compared with those of the conventional one, as shown in FIGS. 3 and 4.

Here, the experimental condition is that the steel strip has a thickness of 0.
27mm, width 914mm, line processing speed 50m / min, 10
0m / min, 150m / min, washing water temperature 25 ° C,
Further, the condition of the apparatus of the present invention is that the negative pressure in the pressure bonding roll is −
402 mmHg, drying roll temperature 95 ° C., the dryer condition of the conventional apparatus is 90 m ³ / min of hot air and 8 hot air temperature.
The temperature is 5 ° C. and the blowing speed of hot air onto the steel strip is 35 m / sec.

FIG. 3 shows the case where the processing speed of the steel strip is 50 m / min. As can be seen from the figure, both the present embodiment and the conventional apparatus have a large amount of water adhering to the edge of the steel strip. Fewer examples.

Further, from FIG. 4, even if the steel strip processing speed is increased, the adhered water content is approximately constant in this embodiment, but it may increase in proportion to the speed in the conventional dryer system. I understand.

Further, comparing the energy consumptions of this embodiment and the conventional method under the conditions of FIG. 3, there is little difference between the two as shown in the following Table 1, but as can be seen from FIG. When the line processing speed is increased, the amount of hot air and the temperature of hot air in the dryer must be increased in the conventional method.

[0036]

[Table 1]

Next, a second embodiment of the present invention shown in FIG. 5 will be described.

In this embodiment, a considerable amount of water can be removed in the water drawing step, but when water is attached in a thick film state to both ends of the steel strip 16, this is to be removed.

In this embodiment, narrow felt belts 19A and 19B are provided at both ends of the steel strip 16, and the felt belt and the drying roll are omitted in the middle portion. Therefore, the felt belts 19A, 19B
Corresponding to the drying rolls 23A, 23B divided into two
Is provided.

Since the other structure and operation are the same as those of the above-mentioned embodiment, the same or corresponding parts are designated by the same reference numerals as those in FIG. 1 and their explanations are omitted.

Although the above embodiment is intended to remove the attached water from the surface of the steel strip, the present invention is also applied to the strips other than the steel strip and the case of removing the attached liquid other than water. It is something.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a device for removing adhered liquid on a surface of a strip according to the present invention.

FIG. 2 is a schematic side view of the embodiment.

FIG. 3 is a diagram showing a comparison of the capabilities of the apparatus of the embodiment and a conventional dryer drying method.

FIG. 4 is a diagram showing the capabilities of the apparatus of the embodiment and a conventional dryer drying method in comparison.

FIG. 5 is a perspective view showing a second embodiment of the present invention.

FIG. 6 is a schematic side view showing a conventional process of removing adhered water on the surface of a steel strip.

[Explanation of symbols]

 10 ... Adhesion liquid removing device 12 ... Water washing device 14 ... Squeezing roll 16 ... Steel strips 18, 19A, 19B ... Felt belt 20 ... Crimping roll 21 ... Suction holes 22, 23A, 23B ... Drying roll 28 ... Negative pressure pump 30 ... Heating source

Claims (3)

[Claims] 1. A felt-like endless belt, and a pressure bonding roll around which the endless belt is wound and which is pressed against the surface of a running belt and is rotated in synchronization with the belt. And a second roll which is arranged in parallel with the pressure-bonding roll and around which the endless belt is wound. The pressure-bonding roll has suction holes formed in its peripheral wall and a negative pressure is applied to the inside thereof. A device for removing adhered liquid on the surface of a belt-shaped article. 2. The second roll according to claim 1,
An adhering liquid removing device for a surface of a strip, which is a drying roll provided with a heating means for heating the wound endless belt. 3. The removal of the adhered liquid on the surface of the belt according to claim 1, wherein the endless belt is provided in a pair of left and right with narrow widths corresponding to both ends of the belt in the width direction. apparatus.